2. Precautions in Operation
General Information
Both cylinder and piston service cannot be carried out when engine mounted on frame.
Specification Unit
᧶
mm
Item Standard
Limit
ID
86.022~86.052
86.100
Cylinder
Bend
-
0.050
Top ring
0.004~0.075
0.011
Clearance
between piston
rings
2
nd
ring 0.02~0.055
0.090
Top ring
0.150~0.300
0.500
2
nd
ring 0.300~0.450
0.650
Ring-end gap
Oil ring side rail
0.200~0.700
-
OD of piston (2
nd
) 85.30~85.50
85.25
Clearance between piston and
cylinder
0.04~0.058 0.120
Piston /
Piston ring
ID of piston pin boss
20.001~20.006
20.020
OD of piston pin
19.996~20.000
19.960
Clearance between piston and pin
0.001~0.010
0.020
ID of connecting rod small-end
20.002~20.01
20.040
3. Trouble Shooting
Low or Unstable Compression Pressure
Cylinder or piston ring worn out
Smoking in Exhaust Pipe
Piston or piston ring worn out
Piston ring installation improperly
Cylinder or piston damage
Knock or Noise
Cylinder or piston ring worn out
Carbon deposits on cylinder head top side
Piston pin hole and piston pin worn out
Engine Overheat
Carbon deposits on cylinder head top side
Cooling pipe clogged or not enough in coolant flow
Summary of Contents for Patriot 430
Page 1: ...SERVICE MANUAL PATRIOT 430...
Page 4: ...3 SERIAL NUMBER Frame number Engine number Home page Contents...
Page 24: ...23...
Page 25: ...24...
Page 26: ...25...
Page 27: ...26...
Page 28: ...27 7 Lubrication Points...
Page 71: ...70 Muffler mounting bolt 12 N m Tighten the muffler bolts specified torque 29 N m...
Page 139: ...L CASE R CASE...
Page 148: ...Apply Loctite 510 Flange sealant to the mating surface of the left crankcase L CASE R CASE...
Page 161: ......
Page 162: ......
Page 235: ...1 Electrical Diagram 18 1...